Factorize:
x2 + x – 132
Now, first we have to find out the numbers whose-
Sum = 1 and
Product = - 132
The numbers are 12 and 11,
So,
x2 + x – 132 = x2 + 12x – 11x – 132
= x(x + 12) – 11(x + 12)
= (x + 12)(x – 11)